Serving tray



FIG. 1 is a top perspective view of a serving tray showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevational view, the right side being a mirror image thereof; and,

FIG. 5 is a front elevational view thereof. 

The ornamental design for a serving tray, as shown and described. 